我需要使用android studio

Question

//这是我尝试检索数据的方法

@Override
    protected void onStart() {
        super.onStart();

    String uid = (String) firebaseAuth.getCurrentUser().getUid();`//setting auth uid to uid variable`

    databaseReference = FirebaseDatabase.getInstance().getReference().child("users").child("profiles").child(uid);

//使用addValue事件列表器

databaseReference.child("users").child("profiles").child(uid).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            String name = (String)dataSnapshot.child("name").getValue();
            text.setText(name);
        }
        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
}

//这是我的数据库

用户

 profiles
  GUiQKxqij3bv4wRCaBcMuN6UNlD3
    address:"Mount Lavinia"
    name:"Hemal Herath"
    tel:"0702221617"
    url:"https://firebasestorage.googleapis.com/v0/b/csa..."

Answer 1

databaseReference.child("users").child("profiles").child(uid).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
         for (DataSnapshot singleSnapShot: dataSnapshot.getChildren()) {
                    switch(singleSnapShot.getKey())
                    {
                        case "address":
                            addressText.setText(singleSnapShot.getValue());
                            break;
                        case "name":
                            nameText.setText(singleSnapShot.getvalue());
                            break;
                        case "tel":
                            telText.setText(singleSnapShot.getvalue());
                            break;
                        case "url":
                            urlText.setText(singleSnapShot.getvalue());
                            break;
                    }
                }
        }
        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
}